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Split out REAL_CODE() from REAL_EXEC(), preparatory to removing REAL_EXEC

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Michael Brown 2006-05-24 09:51:04 +00:00
parent 83d80d9e79
commit 7a53d07027
2 changed files with 35 additions and 31 deletions
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39
src/arch/i386/include/libkir.h
View File

@ -213,31 +213,32 @@ virt_to_user ( void * virtual ) {
#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBKIR
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBKIR
/* REAL_CODE: declare a fragment of code that executes in real mode */
#define REAL_CODE( asm_code_str ) \
".code16\n\t" \
"pushw %%gs\n\t" \
"pushw %%fs\n\t" \
"pushw %%es\n\t" \
"pushw %%ds\n\t" \
asm_code_str \
"popw %%ds\n\t" \
"popw %%es\n\t" \
"popw %%fs\n\t" \
"popw %%gs\n\t" \
".code16gcc\n\t"
/* REAL_EXEC: execute some inline assembly code in a way that matches
* the interface of librm
*/
#define OUT_CONSTRAINTS(...) __VA_ARGS__
#define IN_CONSTRAINTS(...) __VA_ARGS__
#define CLOBBER(...) __VA_ARGS__
#define REAL_EXEC( name, asm_code_str, num_out_constraints, out_constraints, \
in_constraints, clobber ) \
__asm__ __volatile__ ( \
".code16\n\t" \
"pushw %%gs\n\t" \
"pushw %%fs\n\t" \
"pushw %%es\n\t" \
"pushw %%ds\n\t" \
"\n" #name ":\n\t" \
asm_code_str \
"popw %%ds\n\t" \
"popw %%es\n\t" \
"popw %%fs\n\t" \
"popw %%gs\n\t" \
".code16gcc\n\t" \
: out_constraints \
: in_constraints \
: clobber \
);
#define REAL_EXEC( name, asm_code_str, num_out_constraints, \
out_constraints, in_constraints, clobber ) do { \
__asm__ __volatile__ ( \
REAL_CODE ( asm_code_str ) \
: out_constraints : in_constraints : clobber ); \
} while ( 0 )
#endif /* ASSEMBLY */

27
src/arch/i386/include/librm.h
View File

@ -177,6 +177,20 @@ extern void remove_from_rm_stack ( void *data, size_t size );
#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBRM
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBRM
/* REAL_CODE: declare a fragment of code that executes in real mode */
#define REAL_CODE( asm_code_str ) \
"pushl $1f\n\t" \
"call real_call\n\t" \
"addl $4, %%esp\n\t" \
".section \".text16\", \"ax\", @progbits\n\t" \
".code16\n\t" \
".arch i386\n\t" \
"\n1:\n\t" \
asm_code_str "\n\t" \
"ret\n\t" \
".code32\n\t" \
".previous\n\t"
/* REAL_EXEC: execute a fragment of code in real mode */
#define OUT_CONSTRAINTS(...) __VA_ARGS__
#define IN_CONSTRAINTS(...) __VA_ARGS__
@ -184,18 +198,7 @@ extern void remove_from_rm_stack ( void *data, size_t size );
#define REAL_EXEC( name, asm_code_str, num_out_constraints, \
out_constraints, in_constraints, clobber ) do { \
__asm__ __volatile__ ( \
".section \".text16\", \"ax\", @progbits\n\t" \
".code16\n\t" \
".arch i386\n\t" \
#name ":\n\t" \
asm_code_str "\n\t" \
"ret\n\t" \
".size " #name ", . - " #name "\n\t" \
".code32\n\t" \
".previous\n\t" \
"pushl $" #name "\n\t" \
"call real_call\n\t" \
"addl $4, %%esp\n\t" \
REAL_CODE ( asm_code_str ) \
: out_constraints : in_constraints : clobber ); \
} while ( 0 )